EP3067580A1 - Roller bearing guide device - Google Patents
Roller bearing guide device Download PDFInfo
- Publication number
- EP3067580A1 EP3067580A1 EP14860239.4A EP14860239A EP3067580A1 EP 3067580 A1 EP3067580 A1 EP 3067580A1 EP 14860239 A EP14860239 A EP 14860239A EP 3067580 A1 EP3067580 A1 EP 3067580A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lubricant
- main body
- slider main
- rolling bearing
- end cap
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000314 lubricant Substances 0.000 claims abstract description 123
- 238000005096 rolling process Methods 0.000 claims abstract description 104
- 238000005461 lubrication Methods 0.000 claims abstract description 81
- 238000012423 maintenance Methods 0.000 abstract 1
- 238000005470 impregnation Methods 0.000 description 19
- 238000010586 diagram Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 6
- 239000000835 fiber Substances 0.000 description 4
- 239000004519 grease Substances 0.000 description 4
- 210000002445 nipple Anatomy 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C29/00—Bearings for parts moving only linearly
- F16C29/04—Ball or roller bearings
- F16C29/06—Ball or roller bearings in which the rolling bodies circulate partly without carrying load
- F16C29/0602—Details of the bearing body or carriage or parts thereof, e.g. methods for manufacturing or assembly
- F16C29/0609—Details of the bearing body or carriage or parts thereof, e.g. methods for manufacturing or assembly of the ends of the bearing body or carriage where the rolling elements change direction, e.g. end caps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C29/00—Bearings for parts moving only linearly
- F16C29/04—Ball or roller bearings
- F16C29/06—Ball or roller bearings in which the rolling bodies circulate partly without carrying load
- F16C29/0602—Details of the bearing body or carriage or parts thereof, e.g. methods for manufacturing or assembly
- F16C29/0611—Details of the bearing body or carriage or parts thereof, e.g. methods for manufacturing or assembly of the return passages, i.e. the passages where the rolling elements do not carry load
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C29/00—Bearings for parts moving only linearly
- F16C29/04—Ball or roller bearings
- F16C29/06—Ball or roller bearings in which the rolling bodies circulate partly without carrying load
- F16C29/0633—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides
- F16C29/0635—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides whereby the return paths are provided as bores in a main body of the U-shaped carriage, e.g. the main body of the U-shaped carriage is a single part with end caps provided at each end
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C29/00—Bearings for parts moving only linearly
- F16C29/04—Ball or roller bearings
- F16C29/06—Ball or roller bearings in which the rolling bodies circulate partly without carrying load
- F16C29/0633—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides
- F16C29/0669—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides whereby the main body of the U-shaped carriage is an assembly of at least three major parts, e.g. an assembly of a top plate with two separate legs attached thereto in the form of bearing shoes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/66—Special parts or details in view of lubrication
- F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
- F16C33/664—Retaining the liquid in or near the bearing
- F16C33/6648—Retaining the liquid in or near the bearing in a porous or resinous body, e.g. a cage impregnated with the liquid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C29/00—Bearings for parts moving only linearly
- F16C29/04—Ball or roller bearings
- F16C29/06—Ball or roller bearings in which the rolling bodies circulate partly without carrying load
- F16C29/0633—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides
- F16C29/0635—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides whereby the return paths are provided as bores in a main body of the U-shaped carriage, e.g. the main body of the U-shaped carriage is a single part with end caps provided at each end
- F16C29/0638—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides whereby the return paths are provided as bores in a main body of the U-shaped carriage, e.g. the main body of the U-shaped carriage is a single part with end caps provided at each end with balls
- F16C29/0642—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides whereby the return paths are provided as bores in a main body of the U-shaped carriage, e.g. the main body of the U-shaped carriage is a single part with end caps provided at each end with balls with four rows of balls
- F16C29/0647—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides whereby the return paths are provided as bores in a main body of the U-shaped carriage, e.g. the main body of the U-shaped carriage is a single part with end caps provided at each end with balls with four rows of balls with load directions in X-arrangement
Definitions
- the present invention relates to a rolling bearing guide apparatus having a guide rail, a slider, and rolling elements for use in a wide variety of robots, transfer apparatuses, or semiconductor manufacturing apparatuses and the like.
- Known rolling bearing guide apparatuses include linear motion guide apparatuses having a linearly extending guide rail and curvilinear motion guide apparatuses having a curved guide rail.
- the linear motion guide apparatus has, for example, a linear guide rail and a slider straddling on the guide rail and movable relative to the guide rail along its length direction.
- the slider includes a slider main body and end caps provided at its leading and trailing ends with respect to the direction of sliding of the slider.
- a lot of rolling elements roll in a rolling passage formed between the guide rail and the slider main body and circulate in a circulation passage provided in the slider to enable smooth relative movement of the guide rail and the slider.
- the linear guide apparatus can be mounted in any orientation.
- the direction in which the guide rail 2 extends will be referred to as the X axis direction
- the direction perpendicular to the X axis direction and parallel to the surface of the guide rail 2 that is in contact with a part on which the guide rail is mounted will be referred to as the Y direction
- the direction perpendicular to both the X axis direction and the Y axis direction will be referred to as the Z axis direction, as shown in Fig. 1 .
- the curvilinear guide apparatus has a curved guide rail (e.g. an annular guide rail), a slider capable of sliding on the curved guide rail, and rolling elements.
- a curved guide rail e.g. an annular guide rail
- a slider capable of sliding on the curved guide rail
- rolling elements e.g. an annular guide rail
- a through hole is provided in a return guide that constitutes an inner surface of a turn passage in the end cap on the side of the slider main body.
- the through hole passes through the return guide from the slider main body side to the turn passage side, and lubricant is supplied into the turn passage from a lubricant supply passage provided on the side of the return guide facing the slider main body through the through hole.
- a member having a groove for oil supply is provided on the side of the end cap facing the slider main body, and lubricant is supplied into a turn passage through the groove for oil supply.
- Patent Literatures 1 and 2 teach an oil passage that is merely open to the turn passage, out of which a large quantity of lubricant or oil tends to flow at an early stage of supply of lubricant from outside, making it difficult to lubricate rolling elements over a long period of time.
- an object of the present invention is to provide a rolling bearing guide apparatus that enable lubrication of rolling elements over a long period of time and can be maintained with reduced effort.
- a rolling bearing guide apparatus comprising:
- said lubrication member comprise two leg portions arranged on two sides of said guide rail respectively and a body portion integral with said two leg portions.
- said lubrication member comprise two leg portions arranged on two opposite sides of said guide rail respectively and a body portion formed as a part separate from said two leg portions and arranged in contact with said two leg portions.
- the density of said body portion be lower than the density of said leg portions.
- a lubricant container in which lubricant to be supplied to said lubrication member be stored is attached to said slider main body or said end cap.
- said lubricant stored in said lubricant container be supplied to said lubrication member utilizing capillary action.
- said slider main body be provided with a lubricant storing bore in which lubricant is stored, and lubricant be supplied to said lubrication member from said lubricant storing bore.
- the present invention can provide a rolling bearing guide apparatus that enable lubrication of rolling elements over a long period of time and can be maintained with reduced effort.
- FIG. 1 is a perspective view of the rolling bearing guide apparatus according to the first embodiment of the present invention.
- the rolling bearing guide apparatus 1 is made up of a guide rail 2 having a long square rod shape and a slider 3 straddling on the guide rail 2 and movable relative to the guide rail 2 along its length direction.
- the guide rail 2 is made of a metal and has a number of bolt holes 4 passing through it along the Z axis direction.
- the length of the guide rail 2 may be selected as desired to meet requirements.
- the guide rail 2 has edge rolling grooves 5a, 5b having a substantially circular arc cross sectional shape and side rolling grooves 6a, 6b, both of which extend along the X axis direction.
- the side rolling grooves 6a, 6b each have a relief groove on its bottom.
- the guide rail 2 can be mounted on a desired target object by bolts 7 inserted through the bolt holes 4. The target object is not shown in the drawings.
- the slider 3 is made up of a slider main body 8 made of a metal, end caps 9a, 9b attached to the front and rear end of the slider main body 8 with respect to its sliding direction, lubricant containers 10a, 10b that are attached to the slider main body 8 with the end caps 8a, 8b between, and side seals 11a, 11b that are attached to the slider main body 8 with the end caps 9a, 9b and the lubricant containers 10a, 10b between.
- the side seals 11a, 11b each have a lip part made of an elastic material and in sliding contact with the guide rail.
- the lip part prevents foreign matters from entering between the slider 3 and the guide rail 2.
- Figs. 2A and 2B are diagrams showing the end cap 9b, a lubrication member 14, the lubricant container 10b, and the side seal 11b of the rolling bearing guide apparatus according to the first embodiment of the present invention, where Fig. 2A shows the side facing the slider main body, and Fig. 2B shows a cross section along line 2B-2B in Fig. 2A .
- the structure around the other end cap 9a is the same as the structure around the end cap 9b described in the following and will not be described.
- the end cap 9b has a body portion 12 having a substantially quadrangular prism shape extending along the Y axis direction and leg portions 13a, 13b projecting from the respective ends of the body portion 12 in one direction parallel to the Z axis.
- the lubrication member 14, which is made of a sintered material, is arranged on the side of the end cap 9b facing the slider main body.
- the lubrication member 14 is an integral part having a body portion 22 and leg portions 23a, 23b.
- the sintered material of the lubrication member 14 may be porous.
- the sintered material may be replaced by other porous materials.
- the material of the lubrication member 14 may be a porous polymer such as plastic, elastomer, or rubber. With the lubrication member 14, lubricant equal in quantity to lubricant supplied to the rolling elements 16 is guided to the contact portion of the lubrication member with the rolling elements 16.
- the body portion 22 and the leg portions 23a, 23b of the lubrication member 14 may be separate parts that are arranged to be in contact with each other.
- Turn passages 15a, 15b are provided at the boundary of the body portion 12 and the leg portion 13a of the end cap 9b and the boundary of the body portion 12 and the leg portion 13b of the end cap 9b.
- Turn passages 15c, 15b are provided at the end portions of the leg portions 13a, 13b.
- the turn passages 15a to 15d are defined by an outer surface and an inner surface.
- the outer surface is provided on the end cap 9b as a groove and mainly constitutes a surface on the side seal 11b side.
- the inner surface is constituted by the leg portion 23a, 23b of the lubrication member 14 and mainly constitutes a surface on the slider main body 8 side.
- the turn passages 15a to 15d are curved in arc shapes to turn the direction of movement of the rolling elements 16 rolling between the slider main body 8 and the edge rolling grooves 5a, 5b and the side rolling grooves 6a, 6b by 180 degrees.
- the turn passages 15a to 15d cooperate with circulation passages (not shown) to cause the rolling elements 16 to circulate.
- Fig. 2A shows rolling elements 16 received in the turn passages 15a and 15c. Rolling elements 16 are also received in the turn passages 15b and 15d.
- the end cap is formed with through-hole portions 17a, 17b that allow the end cap 9b, the lubricant container 10b, and the side seal 11b to be fixedly attached to the slider main body 8 by screws.
- the through-hole portion 17a, 17b defines a through hole running along the X axis direction and extends as a cylindrical part toward the slider main body 8. The cylindrical part is fitted to a large-diameter portion at the open end (not shown) of a screw hole provided in the slider main body to facilitate positioning of the end cap.
- the lubricant container 10b for storing lubricant is arranged on the side of the end cap 9b opposite to the slider main body 8.
- the side seal 11b is arranged on the side of the lubricant container 10b opposite to the end cap 9b.
- a lubricant impregnation member 33 is housed in the lubricant container 10b.
- the lubricant impregnation member 33 is impregnated with lubricant.
- An introduction member 37 made of a sintered material is arranged in contact with the lubricant impregnation member 33.
- the lubricant impregnated in the lubricant impregnation member 33 is supplied to the body portion 22 of the lubrication member 14 through the introduction member 37 by capillarity.
- the sintered material used in the introduction member 37 may be porous. It is preferred that the density of the introduction member 37 be lower than the density of the lubrication member 14.
- the lubricant supplied to the body portion 22 of the lubrication member 14 is applied to the rolling elements 16 that are in contact with the leg portions 23a, 23b of the lubrication member 14.
- Making use of capillary action enables direct supply of lubricant to the rolling elements 16 no matter in what orientation the rolling bearing guide apparatus 1 is mounted. Without capillary action, there is a possibility that the lubricant in the lubricant container and the end cap may be biased to one side temporarily with movement of the slider 3 to make it hard for the lubricant to flow from the lubricant container to the end cap. Making use of capillary action can prevent this from occurring. When it is necessary to replenish the lubricant container 10b with lubricant, the side seal 11b can be removed to allow the replenishment.
- Figs. 3A, 3B, and 3C are diagrams showing the end cap 9b of the rolling bearing guide apparatus 1 according to the first embodiment of the present invention, where Fig. 3A shows the side facing the slider main body 8, Fig. 3B shows a cross section along line 3B-3B in Figs. 3A and 3C, and Fig. 3C shows the side facing away from the slider main body 8.
- the body portion 12 of the end cap 9b has a through bore 20 for the introduction member at its center, which passes through it along the X axis direction and in which the introduction member 37 is housed.
- body portion screw holes 21a, 21b which pass through the body portion 12 along the X axis direction to allow the end cap 9b, the lubricant container 10b, and the side seal 11b to be fixed to the slider main body 8 by screws.
- a lubrication member receiving portion 18 On the side of the body portion 12 and the leg portions 13a, 13b of the end cap 9b that face the slider main body 8, there is provided a lubrication member receiving portion 18, which is a recess for receiving the lubrication member having a shape similar to the lubrication member 14.
- the lubrication member receiving portion 18 has recessed portions 19a, 19b, 19c, 19d to which projections 24a, 24b, 24c, 24d provided on the lubrication member 14 are to be fitted.
- the projections 24a, 24b, 24c, 24d are shown in Figs. 4A, 4B, and 4C .
- Figs. 4A, 4B, 4C are diagrams showing the lubrication member 14 of the rolling bearing guide apparatus 1 according to the first embodiment of the present invention, where Fig. 4A shows the side facing the end cap 9b, Fig. 4B shows a cross section along line 4B-4B in Fig. 4A, and Fig. 4C shows the bottom.
- the lubrication member 14 includes the body portion 22 and the leg portions 23a, 23b, as described above.
- the body portion 22 is a plate-like portion.
- each of the leg portions 23a, 23b has a half-cylindrical column shape or a shape of a circular column cut into half along its center line, with its curved surface facing the end cap.
- the leg portions 23a, 23b serve as return guides that turn the direction of movement of the rolling elements.
- the body portion 22 of the lubrication member 14 has cylindrical projections 24a, 24b provided on its side facing the end cap 9b at locations near its both ends.
- the leg portions 23a, 23b of the lubrication member 14 each have a cylindrical projection 24c, 24d provided on the side facing the end cap 9b at substantially the center thereof.
- the projections 24a to 24d are fitted to the recessed portions 19a to 19d provided on the lubrication member receiving portion 18 of the end cap 9b. This facilitates positioning of the lubrication member 14.
- the body portion 22 of the lubrication member 14 has screw holes 25a, 25b for the body portion, which pass through it along the X axis direction.
- Figs. 5A and 5B are diagrams showing the lubricant container 10b of the rolling bearing guide apparatus 1 according to the first embodiment of the present invention, where Fig. 5A shows the side facing the side seal 11b, and Fig. 5B shows the lubricant impregnation member 32 housed in the lubricant container 10b.
- the lubricant container 10b has a body portion 26 extending along the Y axis direction and leg portions 27a, 27b extending in one direction along the Z axis direction from both ends of the body portion 26.
- the lubricant container 10b has a box structure that opens toward the side seal 11b.
- a housing space 28 for the lubricant impregnation member 32 is provided on its side facing the side seal 11b.
- the leg portions 27a, 27b of the lubricant container 10b are each formed with a leg's cylindrical portion 29a, 29b, which has a substantially cylindrical shape.
- the leg's cylindrical portions 29a, 29b are used to fix the end cap 9b, the lubricant container 10b, and the side seal 11b to the slider main body 8, with screws passing through them.
- the body portion 26 of the lubricant container 10b has a through hole 31 for the introduction member, which allows the aforementioned introduction member 37 to pass.
- the body portion 26 of the lubricant container 10b has screw holes for the body portion 30a, 30b provided on both sides of the through hole 31 for the introduction member and passing through it along the X axis direction.
- the lubricant impregnation member 32 is made of felt and has a body portion 33 and the leg portions 34a, 34b so that it is housed in the housing space 28 provided in the lubricant container 10b.
- the leg portions 34a, 34b are provided with escape portions 35a, 35b at locations corresponding to the leg's cylindrical portions 29a, 29b.
- the felt used in the lubricant impregnation member 32 may be made of wool, aramid fiber, glass fiber, cellulose fiber, nylon fiber, polyester fiber, polyether fiber, polyolefin fiber, or rayon fiber.
- the body portion 33 of the lubricant impregnation member 32 has a through hole 38 for the introduction member into which the introduction member 37 is to be inserted, provided at a location in alignment with the through hole 31 for the introduction member provided in the lubricant container 10b.
- the body portion 33 of the lubricant impregnation member 32 has screw holes 36a, 36b for the body portion which allow screws to pass through them, on both sides of the through hole 38 for the introduction member.
- an appropriate quantity of lubricant is supplied from the lubrication member 14 to the rolling elements 16. Moreover, since the apparatus is provided with the lubricant container in which lubricant is stored, an excellent lubrication can be maintained for a long period of time without replenishment of lubricant.
- leg portions 23a, 23b of the lubrication member 14 that are in contact with the rolling elements 16 provide inner surfaces of the turn passages 15a, 15b, on which the centrifugal force of the rolling elements 16 moving at high speed does not act, abrasion or breakage of the leg portions 23a, 23b by the contact with the rolling elements 16 can be prevented.
- a rolling bearing guide apparatus according to a second embodiment of the present invention will be described with reference to Figs. 6A and 6b .
- the rolling bearing guide apparatus according to the second embodiment differs from the above-described rolling bearing guide apparatus according to the first embodiment in the structure of the lubrication member and in that the rolling bearing apparatus according to the second embodiment does not have a lubricant container.
- the rolling bearing apparatus according to the second embodiment is the same as the rolling bearing apparatus according to the first embodiment. Therefore, redundant descriptions will not be made, and only the lubrication member and the means for supplying lubricant to the lubrication member will be described.
- Figs. 6A and 6B are diagrams showing an end cap 209b and lubrication members 223a, 223b of the rolling bearing guide apparatus according to the second embodiment of the present invention, where Fig. 6A shows the side facing the slider main body, and Fig. 6B is an enlarged cross sectional view taken along line 6B-6B in Fig. 6A .
- the end cap 209b has the same shape as the end cap 9b in the above-described first embodiment.
- the lubrication members 223a, 223b include only portions equivalent to the leg portions 23a, 23b of the lubrication member 14 in the first embodiment and do not have a portion corresponding to the body portion 22.
- the rolling bearing guide apparatus does not have a lubricant container.
- lubricant is injected through a grease nipple screwed into a female screw thread provided in a lubricant supply hole 220 and stored in a lubricant storing portion 218 provided on the surface of the end cap 209b facing the slider main body as a recess, so that lubricant is supplied from the lubricant storing portion 218.
- the aforementioned grease nipple is not shown in the drawings.
- the female screw thread in the lubricant supply hole 220 is adapted in such a way that the grease nipple can be screwed into it to the extent that the grease nipple does not come in contact with the slider main body.
- the lubricant storing portion 218 may be filled with a lubricant impregnation member different from the lubrication members 223a, 223b. In this case, it is preferred that the lubricant impregnation member have a density lower than the density of the lubrication members 223a, 223b. This enables the lubricant impregnation member to be impregnated with a larger quantity of lubricant.
- the lubrication members 223a, 223b have a substantially trapezoidal shape in their cross section along their width and are round-cornered at their edges 240a, 240b to be in contact with the rolling elements 216.
- the lubrication members 223a, 223b serve as a return guide.
- point contact between the rolling elements and the lubrication members is achieved, enabling reduction of the quantity of lubricant supplied to the rolling elements.
- the rolling elements 216 roll on the upper surface of the trapezoidal lubrication members 223a, 223b. This makes the length of contact of the rolling elements and the lubrication members larger, enabling an increased quantity of lubricant to be supplied to the rolling elements 216, and provides the effect of removing foreign matters from the rolling passage.
- an appropriate quantity of lubricant can be supplied to the rolling elements without a lubricant container, and the frequency of replenishment of lubricant can be decreased.
- the rolling bearing guide apparatus according to a third embodiment of the present invention will be described with reference to Figs. 7A and 7B .
- the rolling bearing guide apparatus according to the third embodiment differs from the rolling bearing guide apparatus according to the first embodiment in that a space in which lubricant is stored is provided in the slider main body instead of the lubricant container and is the same as the apparatus according to the first embodiment in the other respects. Therefore, redundant description will not be made, and the following description will be mainly focused on the structure provided in the slider main body to store lubricant instead of the lubricant container.
- Figs. 7A and 7B are diagrams showing a slider main body 308, an end cap 312, and a lubrication member 314 in the rolling bearing guide apparatus according to the third embodiment of the present invention, where Fig. 7A shows the side of the slider main body on which the end cap is attached, and Fig. 7B shows a cross section along line 7B-7B in Fig. 7A .
- the slider main body 308 includes a body portion 350 having a plate-like shape extending in the X and Y axis directions and leg portions 351a, 351b extending in one direction along the Z axis direction from both ends of the body portion 350 extending in the X axis direction over its entire length along the X axis direction.
- the leg portions 351a, 351b are provided with circulation passages 352a, 352b, 352c, 352d that pass through them along the X axis direction to allow the rolling elements to circulate. Between the circulation passages 352a and 352c and between the circulation passages 352b and 352d, there are provided leg's screw holes 357a, 357b having a female screw thread inside to allow screws for fixing the end cap and the side seal to the slider main body 308 to be screwed in them.
- the opposed surfaces of the leg portions 351a and 351b are provided with rolling grooves 353a, 353b, 353c, 353d extending along the X axis direction, which allow the rolling elements to roll between the guide rail and them.
- the body portion 350 of the slider main body 308 is provided with body's screw holes 354a, 354b having a female screw thread inside to allow screws for fixing the end cap and the side seal to the slider main body 308 to be screwed in them.
- the body portion 350 is provided with a lubricant storing bore 355, which extends from the center of the end surface of the body portion 350 that faces the end cap in the X axis direction.
- the lubricant storing bore 355 is filled with a lubricant impregnation member 356.
- the lubricant impregnation member 356 is in contact with the lubrication member 314, so that lubricant stored in the lubricant impregnation member 356 is supplied to the lubrication member 314.
- lubricant is applied to the rolling elements passing through the turn passage by the lubrication member 314.
- the apparatus according to the third embodiment does not have a lubricant container. This makes the number of components smaller than that in the apparatus according to the first embodiment, saving efforts of assembly and enabling reduction in the size of the slider along its moving direction. Moreover, since an appropriate quantity of lubricant can be supplied to the rolling elements, excellent lubrication state can be maintained for a long period of time without replenishment of lubricant.
- the cross sectional shape of the leg portions 23a, 23b of the lubrication member 14 in the first embodiment may be adopted in the lubrication members 223a, 223b in the second embodiment.
- the cross sectional shape of the lubrication members 223a, 223b in the second embodiment may be adopted in the leg portions 23a, 23b of the lubrication member 14 in the first embodiment.
- the lubricant container in the first embodiment is not necessarily required to be provided on both the front and rear side of the slider, but it may be provided only one of the front and rear sides. Alternatively, the lubricant container may be provided at a location other than the front and rear of the slider.
- the lubricant container may be adopted in combination with the lubricant storing bore according to the third embodiment.
- the lubricant storing bore according to the third embodiment may be provided for either both or one of the lubrication members provided on the front and rear sides of the slider.
- the lubricant storing bore may be configured to pass through the slider along the X axis direction to supply lubricant to both of the sliders provided on the front and rear sides of the slider.
- the arrangement for supplying lubricant according to the present invention can be applied not only to apparatuses in which two rolling grooves are provided on each of the two opposite sides of the guide rail as in the above-described embodiment but also to apparatuses in which one or three or more rolling grooves are provided on each of the two opposite sides of the guide rail.
- the shape of the lubrication member is not limited to those in the above-described embodiments, but it may have any shape on condition that it is exposed to the turn passage and able to apply lubricant to rolling elements without hindering rolling of the rolling elements.
- the present invention can provide a rolling bearing guide apparatus that allows lubrication of rolling elements over a long period of time and can be maintained with reduced effort.
Abstract
Description
- The present invention relates to a rolling bearing guide apparatus having a guide rail, a slider, and rolling elements for use in a wide variety of robots, transfer apparatuses, or semiconductor manufacturing apparatuses and the like.
- Known rolling bearing guide apparatuses include linear motion guide apparatuses having a linearly extending guide rail and curvilinear motion guide apparatuses having a curved guide rail.
- The linear motion guide apparatus has, for example, a linear guide rail and a slider straddling on the guide rail and movable relative to the guide rail along its length direction. The slider includes a slider main body and end caps provided at its leading and trailing ends with respect to the direction of sliding of the slider. A lot of rolling elements roll in a rolling passage formed between the guide rail and the slider main body and circulate in a circulation passage provided in the slider to enable smooth relative movement of the guide rail and the slider. The linear guide apparatus can be mounted in any orientation. In this specification, the direction in which the
guide rail 2 extends will be referred to as the X axis direction, the direction perpendicular to the X axis direction and parallel to the surface of theguide rail 2 that is in contact with a part on which the guide rail is mounted will be referred to as the Y direction, and the direction perpendicular to both the X axis direction and the Y axis direction will be referred to as the Z axis direction, as shown inFig. 1 . - The curvilinear guide apparatus has a curved guide rail (e.g. an annular guide rail), a slider capable of sliding on the curved guide rail, and rolling elements.
- As disclosed in
Patent Literature 1, in some rolling bearing guide apparatuses as such, a through hole is provided in a return guide that constitutes an inner surface of a turn passage in the end cap on the side of the slider main body. The through hole passes through the return guide from the slider main body side to the turn passage side, and lubricant is supplied into the turn passage from a lubricant supply passage provided on the side of the return guide facing the slider main body through the through hole. - As disclosed in
Patent Literature 2, in some rolling bearing guide apparatuses, a member having a groove for oil supply is provided on the side of the end cap facing the slider main body, and lubricant is supplied into a turn passage through the groove for oil supply. -
- Patent Literature 1: Japanese Patent Application Laid-Open No.
2008-291938 - Patent Literature 2: Japanese Patent Application Laid-Open No.
2010-185582 - The inventions disclosed in
Patent Literatures - In view of the above problem, an object of the present invention is to provide a rolling bearing guide apparatus that enable lubrication of rolling elements over a long period of time and can be maintained with reduced effort.
- To solve the above problem, the present invention provides a rolling bearing guide apparatus comprising:
- a guide rail;
- a slider main body sliding on said guide rail;
- rolling elements that roll between said slider main body and said guide rail as said slider main body slides; and
- an end cap attached to an end surface of said slider main body that is located at a front or rear end thereof when said slider main body is sliding, and defining a turn passage that turns the direction of movement of said rolling elements;
- the rolling bearing guide apparatus being characterized by comprising a lubrication member impregnated with lubricant, arranged between said slider main body and said end cap, and partly exposed inside said turn passage.
- It is preferred that said lubrication member comprise two leg portions arranged on two sides of said guide rail respectively and a body portion integral with said two leg portions.
- It is preferred that said lubrication member comprise two leg portions arranged on two opposite sides of said guide rail respectively and a body portion formed as a part separate from said two leg portions and arranged in contact with said two leg portions.
- It is preferred that the density of said body portion be lower than the density of said leg portions.
- It is preferred that a lubricant container in which lubricant to be supplied to said lubrication member be stored is attached to said slider main body or said end cap.
- It is preferred that said lubricant stored in said lubricant container be supplied to said lubrication member utilizing capillary action.
- It is preferred that said slider main body be provided with a lubricant storing bore in which lubricant is stored, and lubricant be supplied to said lubrication member from said lubricant storing bore.
- The present invention can provide a rolling bearing guide apparatus that enable lubrication of rolling elements over a long period of time and can be maintained with reduced effort.
-
-
Fig. 1 is a perspective view of the rolling bearing guide apparatus according to a first embodiment of the present invention. -
Figs. 2A and 2B are diagrams showing an end cap, a lubrication member, a lubricant container, and a side seal of the rolling bearing guide apparatus according to the first embodiment of the present invention, whereFig. 2A shows the side facing the slider main body, andFig. 2B shows a cross section alongline 2B-2B inFig. 2A . -
Figs. 3A, 3B, and 3C are diagrams showing the end cap of the rolling bearing guide apparatus according to the first embodiment of the present invention, whereFig. 3A shows the side facing the slider main body ,Fig. 3B shows a cross section alongline 3B-3B inFigs. 3A and 3C, and Fig. 3C shows the side facing away from the slider main body. -
Figs. 4A, 4B, 4C are diagrams showing the lubrication member of the rolling bearing guide apparatus according to the first embodiment of the present invention, whereFig. 4A shows the side facing the end cap,Fig. 4B shows a cross section alongline 4B-4B inFig. 4A, and Fig. 4C shows the bottom. -
Figs. 5A and 5B are diagrams showing the lubricant container of the rolling bearing guide apparatus according to the first embodiment of the present invention, whereFig. 5A shows the side facing the side seal, andFig. 5B shows a lubricant impregnation member housed in the lubricant container. -
Figs. 6A and 6B are diagrams showing an end cap and lubrication members of a rolling bearing guide apparatus according to a second embodiment of the present invention, whereFig. 6A shows the side facing the slider main body, andFig. 6B is an enlarged cross sectional view taken alongline 6B-6B inFig. 6A . -
Figs. 7A and 7B are diagrams showing a slider main body, an end cap, and a lubrication member in a rolling bearing guide apparatus according to a third embodiment of the present invention, whereFig. 7A shows the side of the slider main body on which the end cap is attached, andFig. 7B shows a cross section alongline 7B-7B inFig. 7A . - A rolling bearing guide apparatus according to a first embodiment of the present invention will be described with reference to
Figs. 1 to 5B .Fig. 1 is a perspective view of the rolling bearing guide apparatus according to the first embodiment of the present invention. - As shown in
Fig. 1 , the rollingbearing guide apparatus 1 is made up of aguide rail 2 having a long square rod shape and aslider 3 straddling on theguide rail 2 and movable relative to theguide rail 2 along its length direction. - The
guide rail 2 is made of a metal and has a number ofbolt holes 4 passing through it along the Z axis direction. The length of theguide rail 2 may be selected as desired to meet requirements. Theguide rail 2 hasedge rolling grooves side rolling grooves side rolling grooves guide rail 2 can be mounted on a desired target object bybolts 7 inserted through the bolt holes 4. The target object is not shown in the drawings. - The
slider 3 is made up of a slidermain body 8 made of a metal,end caps main body 8 with respect to its sliding direction,lubricant containers main body 8 with the end caps 8a, 8b between, andside seals main body 8 with theend caps lubricant containers - The side seals 11a, 11b each have a lip part made of an elastic material and in sliding contact with the guide rail. The lip part prevents foreign matters from entering between the
slider 3 and theguide rail 2. -
Figs. 2A and 2B are diagrams showing theend cap 9b, alubrication member 14, thelubricant container 10b, and theside seal 11b of the rolling bearing guide apparatus according to the first embodiment of the present invention, whereFig. 2A shows the side facing the slider main body, andFig. 2B shows a cross section alongline 2B-2B inFig. 2A . The structure around theother end cap 9a is the same as the structure around theend cap 9b described in the following and will not be described. - As shown in
Fig. 2A , theend cap 9b has abody portion 12 having a substantially quadrangular prism shape extending along the Y axis direction andleg portions body portion 12 in one direction parallel to the Z axis. Thelubrication member 14, which is made of a sintered material, is arranged on the side of theend cap 9b facing the slider main body. Thelubrication member 14 is an integral part having abody portion 22 andleg portions lubrication member 14 may be porous. The sintered material may be replaced by other porous materials. The material of thelubrication member 14 may be a porous polymer such as plastic, elastomer, or rubber. With thelubrication member 14, lubricant equal in quantity to lubricant supplied to the rollingelements 16 is guided to the contact portion of the lubrication member with the rollingelements 16. Thebody portion 22 and theleg portions lubrication member 14 may be separate parts that are arranged to be in contact with each other. -
Turn passages body portion 12 and theleg portion 13a of theend cap 9b and the boundary of thebody portion 12 and theleg portion 13b of theend cap 9b.Turn passages leg portions turn passages 15a to 15d are defined by an outer surface and an inner surface. The outer surface is provided on theend cap 9b as a groove and mainly constitutes a surface on theside seal 11b side. The inner surface is constituted by theleg portion lubrication member 14 and mainly constitutes a surface on the slidermain body 8 side. - The
turn passages 15a to 15d are curved in arc shapes to turn the direction of movement of the rollingelements 16 rolling between the slidermain body 8 and theedge rolling grooves side rolling grooves turn passages 15a to 15d cooperate with circulation passages (not shown) to cause the rollingelements 16 to circulate.Fig. 2A shows rollingelements 16 received in theturn passages Rolling elements 16 are also received in theturn passages - Between the
turn passage 15a and theturn passage 15c and between theturn passage 15b and theturn passage 15d, the end cap is formed with through-hole portions end cap 9b, thelubricant container 10b, and theside seal 11b to be fixedly attached to the slidermain body 8 by screws. The through-hole portion main body 8. The cylindrical part is fitted to a large-diameter portion at the open end (not shown) of a screw hole provided in the slider main body to facilitate positioning of the end cap. - As shown in
Fig. 2B , thelubricant container 10b for storing lubricant is arranged on the side of theend cap 9b opposite to the slidermain body 8. Theside seal 11b is arranged on the side of thelubricant container 10b opposite to theend cap 9b. - A
lubricant impregnation member 33 is housed in thelubricant container 10b. Thelubricant impregnation member 33 is impregnated with lubricant. Anintroduction member 37 made of a sintered material is arranged in contact with thelubricant impregnation member 33. The lubricant impregnated in thelubricant impregnation member 33 is supplied to thebody portion 22 of thelubrication member 14 through theintroduction member 37 by capillarity. The sintered material used in theintroduction member 37 may be porous. It is preferred that the density of theintroduction member 37 be lower than the density of thelubrication member 14. This enables smooth introduction of lubricant to thelubrication member 14 while preventing excessive supply of lubricant to the rolling elements. The lubricant supplied to thebody portion 22 of thelubrication member 14 is applied to the rollingelements 16 that are in contact with theleg portions lubrication member 14. Making use of capillary action enables direct supply of lubricant to the rollingelements 16 no matter in what orientation the rollingbearing guide apparatus 1 is mounted. Without capillary action, there is a possibility that the lubricant in the lubricant container and the end cap may be biased to one side temporarily with movement of theslider 3 to make it hard for the lubricant to flow from the lubricant container to the end cap. Making use of capillary action can prevent this from occurring. When it is necessary to replenish thelubricant container 10b with lubricant, theside seal 11b can be removed to allow the replenishment. -
Figs. 3A, 3B, and 3C are diagrams showing theend cap 9b of the rollingbearing guide apparatus 1 according to the first embodiment of the present invention, whereFig. 3A shows the side facing the slidermain body 8,Fig. 3B shows a cross section alongline 3B-3B inFigs. 3A and 3C, and Fig. 3C shows the side facing away from the slidermain body 8. - The
body portion 12 of theend cap 9b has a throughbore 20 for the introduction member at its center, which passes through it along the X axis direction and in which theintroduction member 37 is housed. - On both sides of the through
bore 20 for the introduction member, there are provided bodyportion screw holes body portion 12 along the X axis direction to allow theend cap 9b, thelubricant container 10b, and theside seal 11b to be fixed to the slidermain body 8 by screws. - On the side of the
body portion 12 and theleg portions end cap 9b that face the slidermain body 8, there is provided a lubricationmember receiving portion 18, which is a recess for receiving the lubrication member having a shape similar to thelubrication member 14. - The lubrication
member receiving portion 18 has recessedportions projections lubrication member 14 are to be fitted. Theprojections Figs. 4A, 4B, and 4C . -
Figs. 4A, 4B, 4C are diagrams showing thelubrication member 14 of the rollingbearing guide apparatus 1 according to the first embodiment of the present invention, whereFig. 4A shows the side facing theend cap 9b,Fig. 4B shows a cross section alongline 4B-4B inFig. 4A, and Fig. 4C shows the bottom. - The
lubrication member 14 includes thebody portion 22 and theleg portions body portion 22 is a plate-like portion. As will be seen inFig. 4C , each of theleg portions leg portions - The
body portion 22 of thelubrication member 14 hascylindrical projections end cap 9b at locations near its both ends. Theleg portions lubrication member 14 each have acylindrical projection end cap 9b at substantially the center thereof. Theprojections 24a to 24d are fitted to the recessedportions 19a to 19d provided on the lubricationmember receiving portion 18 of theend cap 9b. This facilitates positioning of thelubrication member 14. - The
body portion 22 of thelubrication member 14 hasscrew holes -
Figs. 5A and 5B are diagrams showing thelubricant container 10b of the rollingbearing guide apparatus 1 according to the first embodiment of the present invention, whereFig. 5A shows the side facing theside seal 11b, andFig. 5B shows thelubricant impregnation member 32 housed in thelubricant container 10b. - The
lubricant container 10b has abody portion 26 extending along the Y axis direction andleg portions body portion 26. Thelubricant container 10b has a box structure that opens toward theside seal 11b. Ahousing space 28 for thelubricant impregnation member 32 is provided on its side facing theside seal 11b. - The
leg portions lubricant container 10b are each formed with a leg'scylindrical portion cylindrical portions end cap 9b, thelubricant container 10b, and theside seal 11b to the slidermain body 8, with screws passing through them. - The
body portion 26 of thelubricant container 10b has a throughhole 31 for the introduction member, which allows theaforementioned introduction member 37 to pass. Thebody portion 26 of thelubricant container 10b has screw holes for thebody portion hole 31 for the introduction member and passing through it along the X axis direction. - As shown in
Fig. 5B , thelubricant impregnation member 32 is made of felt and has abody portion 33 and theleg portions housing space 28 provided in thelubricant container 10b. To avoid interference with the leg'scylindrical portions lubricant container 10b, theleg portions escape portions cylindrical portions lubricant impregnation member 32 may be made of wool, aramid fiber, glass fiber, cellulose fiber, nylon fiber, polyester fiber, polyether fiber, polyolefin fiber, or rayon fiber. - The
body portion 33 of thelubricant impregnation member 32 has a throughhole 38 for the introduction member into which theintroduction member 37 is to be inserted, provided at a location in alignment with the throughhole 31 for the introduction member provided in thelubricant container 10b. Thebody portion 33 of thelubricant impregnation member 32 hasscrew holes hole 38 for the introduction member. - In the above-described apparatus according to the first embodiment of the present invention, an appropriate quantity of lubricant is supplied from the
lubrication member 14 to the rollingelements 16. Moreover, since the apparatus is provided with the lubricant container in which lubricant is stored, an excellent lubrication can be maintained for a long period of time without replenishment of lubricant. - Since the
leg portions lubrication member 14 that are in contact with the rollingelements 16 provide inner surfaces of theturn passages elements 16 moving at high speed does not act, abrasion or breakage of theleg portions elements 16 can be prevented. - A rolling bearing guide apparatus according to a second embodiment of the present invention will be described with reference to
Figs. 6A and 6b . The rolling bearing guide apparatus according to the second embodiment differs from the above-described rolling bearing guide apparatus according to the first embodiment in the structure of the lubrication member and in that the rolling bearing apparatus according to the second embodiment does not have a lubricant container. In the other respects, the rolling bearing apparatus according to the second embodiment is the same as the rolling bearing apparatus according to the first embodiment. Therefore, redundant descriptions will not be made, and only the lubrication member and the means for supplying lubricant to the lubrication member will be described. -
Figs. 6A and 6B are diagrams showing anend cap 209b andlubrication members Fig. 6A shows the side facing the slider main body, andFig. 6B is an enlarged cross sectional view taken alongline 6B-6B inFig. 6A . - In the second embodiment, the
end cap 209b has the same shape as theend cap 9b in the above-described first embodiment. Thelubrication members leg portions lubrication member 14 in the first embodiment and do not have a portion corresponding to thebody portion 22. - As described above, the rolling bearing guide apparatus according to the second embodiment does not have a lubricant container. To supply lubricant to the
lubrication members lubricant supply hole 220 and stored in alubricant storing portion 218 provided on the surface of theend cap 209b facing the slider main body as a recess, so that lubricant is supplied from thelubricant storing portion 218. The aforementioned grease nipple is not shown in the drawings. The female screw thread in thelubricant supply hole 220 is adapted in such a way that the grease nipple can be screwed into it to the extent that the grease nipple does not come in contact with the slider main body. Thelubricant storing portion 218 may be filled with a lubricant impregnation member different from thelubrication members lubrication members - As will be seen from the
cross section 6B-6B shown inFig. 6B , thelubrication members edges elements 216. Thelubrication members leg portions lubrication member 14 in the above-described first embodiment, point contact between the rolling elements and the lubrication members is achieved, enabling reduction of the quantity of lubricant supplied to the rolling elements. On the other hand, in the case of thelubrication members elements 216 roll on the upper surface of thetrapezoidal lubrication members elements 216, and provides the effect of removing foreign matters from the rolling passage. - In the apparatus according to the second embodiment, an appropriate quantity of lubricant can be supplied to the rolling elements without a lubricant container, and the frequency of replenishment of lubricant can be decreased.
- The rolling bearing guide apparatus according to a third embodiment of the present invention will be described with reference to
Figs. 7A and 7B . The rolling bearing guide apparatus according to the third embodiment differs from the rolling bearing guide apparatus according to the first embodiment in that a space in which lubricant is stored is provided in the slider main body instead of the lubricant container and is the same as the apparatus according to the first embodiment in the other respects. Therefore, redundant description will not be made, and the following description will be mainly focused on the structure provided in the slider main body to store lubricant instead of the lubricant container. -
Figs. 7A and 7B are diagrams showing a slidermain body 308, anend cap 312, and alubrication member 314 in the rolling bearing guide apparatus according to the third embodiment of the present invention, whereFig. 7A shows the side of the slider main body on which the end cap is attached, andFig. 7B shows a cross section alongline 7B-7B inFig. 7A . - The slider
main body 308 includes abody portion 350 having a plate-like shape extending in the X and Y axis directions andleg portions body portion 350 extending in the X axis direction over its entire length along the X axis direction. - The
leg portions circulation passages circulation passages circulation passages screw holes main body 308 to be screwed in them. The opposed surfaces of theleg portions grooves - The
body portion 350 of the slidermain body 308 is provided with body'sscrew holes main body 308 to be screwed in them. - Moreover, the
body portion 350 is provided with a lubricant storing bore 355, which extends from the center of the end surface of thebody portion 350 that faces the end cap in the X axis direction. The lubricant storing bore 355 is filled with alubricant impregnation member 356. - As shown in
Fig. 7B , thelubricant impregnation member 356 is in contact with thelubrication member 314, so that lubricant stored in thelubricant impregnation member 356 is supplied to thelubrication member 314. Thus, lubricant is applied to the rolling elements passing through the turn passage by thelubrication member 314. - The apparatus according to the third embodiment does not have a lubricant container. This makes the number of components smaller than that in the apparatus according to the first embodiment, saving efforts of assembly and enabling reduction in the size of the slider along its moving direction. Moreover, since an appropriate quantity of lubricant can be supplied to the rolling elements, excellent lubrication state can be maintained for a long period of time without replenishment of lubricant.
- While specific embodiments of the present invention have been described in the foregoing, the present invention is not limited to them, but various modifications and improvements can be made to them.
- For instance, as to the cross sectional shape of the portion of the lubrication member to be in contact with the rolling elements, the cross sectional shape of the
leg portions lubrication member 14 in the first embodiment may be adopted in thelubrication members lubrication members leg portions lubrication member 14 in the first embodiment. - The lubricant container in the first embodiment is not necessarily required to be provided on both the front and rear side of the slider, but it may be provided only one of the front and rear sides. Alternatively, the lubricant container may be provided at a location other than the front and rear of the slider. The lubricant container may be adopted in combination with the lubricant storing bore according to the third embodiment.
- The lubricant storing bore according to the third embodiment may be provided for either both or one of the lubrication members provided on the front and rear sides of the slider. Alternatively, the lubricant storing bore may be configured to pass through the slider along the X axis direction to supply lubricant to both of the sliders provided on the front and rear sides of the slider.
- The arrangement for supplying lubricant according to the present invention can be applied not only to apparatuses in which two rolling grooves are provided on each of the two opposite sides of the guide rail as in the above-described embodiment but also to apparatuses in which one or three or more rolling grooves are provided on each of the two opposite sides of the guide rail.
- The shape of the lubrication member is not limited to those in the above-described embodiments, but it may have any shape on condition that it is exposed to the turn passage and able to apply lubricant to rolling elements without hindering rolling of the rolling elements.
- As described above, the present invention can provide a rolling bearing guide apparatus that allows lubrication of rolling elements over a long period of time and can be maintained with reduced effort.
-
- 1:
- rolling bearing guide apparatus
- 2:
- guide rail
- 3:
- slider
- 4:
- bolt hole
- 5a, 5b:
- edge rolling groove
- 6a, 6b:
- side rolling groove
- 7:
- bolt
- 8, 308:
- slider main body
- 9a, 9b, 209b, 309a:
- end cap
- 10a, 10b:
- container
- 11a, 11b:
- side seal
- 12, 312:
- body portion
- 13a, 13b, 313a:
- leg portion
- 14, 314:
- lubrication member
- 15a, 15b, 15c, 15d, 215a, 215b, 215c, 215d:
- turn passage
- 16, 216:
- rolling element
- 17a, 17b, 217a, 217b:
- through-hole portion
- 18:
- lubrication member receiving portion
- 19a, 19b, 19c, 19d:
- recessed portion
- 20:
- through bore
- 21a, 21b:
- body portion screw hole
- 22:
- body portion
- 23a, 23b:
- leg portion
- 24a, 24b, 24c, 24d:
- projection
- 25a, 25b:
- body's screw hole
- 26:
- body portion
- 27a, 27b:
- leg portion
- 28:
- housing space
- 29a, 29b:
- leg's cylindrical portion
- 30a, 30b:
- body's screw hole
- 31:
- through hole for introduction member
- 32:
- lubricant impregnation member
- 33:
- body portion
- 34a, 34b:
- leg portion
- 35a, 35b:
- escape portion
- 36a, 36b:
- body's screw hole
- 37:
- introduction member
- 220:
- lubricant supply hole
- 223a, 223b:
- lubrication member
- 240a, 240b:
- edge
- 350:
- body portion
- 351a, 351b:
- leg portion
- 352a, 352b, 352c, 352d:
- circulation passage
- 353a, 353b, 353c, 353d:
- rolling groove
- 354a, 354b:
- body's screw hole
- 355:
- lubricant storing bore
- 356:
- lubricant impregnation member
- 357a, 357b:
- leg's screw hole
Claims (7)
- A rolling bearing guide apparatus comprising:a guide rail;a slider main body sliding on said guide rail;rolling elements that roll between said slider main body and said guide rail as said slider main body slides; andan end cap attached to an end surface of said slider main body that is located at a front or rear end thereof when said slider main body is sliding, and defining a turn passage that turns the direction of movement of said rolling elements;the rolling bearing guide apparatus being characterized by comprising a lubrication member impregnated with lubricant, arranged between said slider main body and said end cap, and partly exposed inside said turn passage.
- A rolling bearing guide apparatus according to claim 1, characterized in that said lubrication member comprises two leg portions arranged on two sides of said guide rail respectively and a body portion integral with said two leg portions.
- A rolling bearing guide apparatus according to claim 1, characterized in that said lubrication member comprises two leg portions arranged on two opposite sides of said guide rail respectively and a body portion formed as a part separate from said two leg portions and arranged in contact with said two leg portions.
- A rolling bearing guide apparatus according to claim 2 or 3, characterized in that the density of said body portion is lower than the density of said leg portions.
- A rolling bearing guide apparatus according to claim 1, characterized in that a lubricant container in which lubricant to be supplied to said lubrication member is stored is attached to said slider main body or said end cap.
- A rolling bearing guide apparatus according to claim 5, characterized in that said lubricant stored in said lubricant container is supplied to said lubrication member utilizing capillary action.
- A rolling bearing guide apparatus according to claim 1, characterized in that said slider main body is provided with a lubricant storing bore in which lubricant is stored, and lubricant is supplied to said lubrication member from said lubricant storing bore.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013230384A JP2015090187A (en) | 2013-11-06 | 2013-11-06 | Rolling bearing guide device |
PCT/JP2014/079067 WO2015068653A1 (en) | 2013-11-06 | 2014-10-31 | Roller bearing guide device |
Publications (3)
Publication Number | Publication Date |
---|---|
EP3067580A1 true EP3067580A1 (en) | 2016-09-14 |
EP3067580A4 EP3067580A4 (en) | 2017-07-19 |
EP3067580B1 EP3067580B1 (en) | 2019-11-20 |
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ID=53041430
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP14860239.4A Active EP3067580B1 (en) | 2013-11-06 | 2014-10-31 | Roller bearing guide device |
Country Status (5)
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US (1) | US9803688B2 (en) |
EP (1) | EP3067580B1 (en) |
JP (1) | JP2015090187A (en) |
CN (1) | CN105705806B (en) |
WO (1) | WO2015068653A1 (en) |
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WO2014156473A1 (en) * | 2013-03-27 | 2014-10-02 | 日本精工株式会社 | Oil supply device for linear guide device, and linear guide device |
CN108301768A (en) * | 2017-12-27 | 2018-07-20 | 中国石油集团长城钻探工程有限公司 | A kind of drilling direction control system |
CN108331543A (en) * | 2017-12-27 | 2018-07-27 | 中国石油集团长城钻探工程有限公司 | A kind of rotary steering drilling tool |
JP7352167B2 (en) * | 2019-11-05 | 2023-09-28 | 株式会社アイシン | drive device |
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JP3738484B2 (en) * | 1996-05-10 | 2006-01-25 | 日本精工株式会社 | Linear motion guide bearing device with lubricant supply device |
JP3945840B2 (en) * | 1996-07-05 | 2007-07-18 | Thk株式会社 | Linear guide device |
JP3733654B2 (en) * | 1996-08-30 | 2006-01-11 | 日本精工株式会社 | Lubricating linear guide device with lubricant-containing polymer |
JP4070265B2 (en) * | 1997-07-01 | 2008-04-02 | Thk株式会社 | Linear guide device |
JP3935247B2 (en) * | 1997-09-18 | 2007-06-20 | 日本トムソン株式会社 | Linear motion guidance unit |
JP4112076B2 (en) * | 1998-06-05 | 2008-07-02 | 日本トムソン株式会社 | Linear motion guide unit with lubrication plate |
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JP2000161356A (en) * | 1998-11-26 | 2000-06-13 | Nsk Ltd | Linear guide device |
JP3308944B2 (en) * | 1998-12-04 | 2002-07-29 | テイエチケー株式会社 | Dust-proof structure of guide device |
JP2002147453A (en) * | 2000-11-10 | 2002-05-22 | Enshu Ltd | Lubricating oil feeder and linear movement device using the same |
US20050178619A1 (en) * | 2004-02-17 | 2005-08-18 | Liao Chi-Meng | Lubrication module of linear guideway |
TWI260374B (en) * | 2005-01-13 | 2006-08-21 | Hiwin Tech Corp | Linear guideway with a changeable oil-storage unit |
JP2006234039A (en) * | 2005-02-23 | 2006-09-07 | Shangyin Sci & Technol Co Ltd | Linear guide way having replaceable oil supply unit |
JP4521305B2 (en) * | 2005-03-23 | 2010-08-11 | 日本トムソン株式会社 | Linear motion guidance unit |
TWI285244B (en) * | 2005-12-20 | 2007-08-11 | Chieftech Prec Co Ltd | Linear guide |
JP4615466B2 (en) * | 2006-03-22 | 2011-01-19 | 日本トムソン株式会社 | Linear motion guide unit with high-sealing seal device |
DE102006056805B3 (en) * | 2006-12-01 | 2008-07-10 | Hiwin Technologies Corp. | Oil tank for supplying lubricating oil i.e. grease, to linear guide, has graduated section provided with two grooves, which are covered in axial direction of oil conveying element, where grooves are connected with inner area of pipe |
JP4776558B2 (en) * | 2007-01-31 | 2011-09-21 | 株式会社椿本チエイン | Shaft seizure prevention sprocket |
US7614790B2 (en) * | 2007-05-15 | 2009-11-10 | Hiwin Technologies Corp. | Linear driving device with a self-lubricating assembly |
JP4625483B2 (en) * | 2007-05-23 | 2011-02-02 | 上銀科技股▲分▼有限公司 | Linear drive module with self-lubricating unit |
JP4957381B2 (en) | 2007-05-25 | 2012-06-20 | 日本精工株式会社 | Slider for linear motion guide device and linear motion guide device |
DE102008053504B4 (en) * | 2008-10-28 | 2023-01-26 | Paul Hettich Gmbh & Co. Kg | Pull-out guide for furniture |
JP5071524B2 (en) | 2010-06-04 | 2012-11-14 | 日本精工株式会社 | Linear motion rolling guide |
JP5685450B2 (en) | 2011-01-27 | 2015-03-18 | 日本トムソン株式会社 | Linear motion rolling guide unit that extends the lubrication life |
JP5767561B2 (en) * | 2011-10-27 | 2015-08-19 | 日本トムソン株式会社 | Linear motion guidance unit |
JP5876706B2 (en) * | 2011-10-28 | 2016-03-02 | 日本トムソン株式会社 | Linear motion rolling guide unit |
JP5938196B2 (en) * | 2011-11-24 | 2016-06-22 | 日本トムソン株式会社 | Linear motion rolling guide unit |
CN103256303B (en) * | 2012-02-20 | 2015-07-29 | 上银科技股份有限公司 | The linear slide rail of tool lubricating oil path |
-
2013
- 2013-11-06 JP JP2013230384A patent/JP2015090187A/en active Pending
-
2014
- 2014-10-31 US US15/030,033 patent/US9803688B2/en active Active
- 2014-10-31 CN CN201480059204.0A patent/CN105705806B/en active Active
- 2014-10-31 EP EP14860239.4A patent/EP3067580B1/en active Active
- 2014-10-31 WO PCT/JP2014/079067 patent/WO2015068653A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
EP3067580B1 (en) | 2019-11-20 |
CN105705806B (en) | 2018-03-13 |
CN105705806A (en) | 2016-06-22 |
WO2015068653A1 (en) | 2015-05-14 |
EP3067580A4 (en) | 2017-07-19 |
US20160245337A1 (en) | 2016-08-25 |
JP2015090187A (en) | 2015-05-11 |
US9803688B2 (en) | 2017-10-31 |
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